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20-letter words containing t, o, a, d

  • dictionary catalogue — a catalogue of the authors, titles, and subjects of books in one alphabetical sequence
  • diels-alder reaction — the reaction in which a conjugated diene combines with a double or triple bond of a given compound to form a ring of six carbon atoms.
  • differential housing — the casing that houses the differential of a motor vehicle
  • diisobutyl phthalate — a clear, colorless liquid, C 14 H 26 O 4 , used chiefly as a plasticizer for nitrocellulose.
  • diophantine analysis — any of several methods for finding integral solutions for equations with more than one variable whose coefficients are integers.
  • diophantine equation — an equation involving more than one variable in which the coefficients of the variables are integers and for which integral solutions are sought.
  • diplomatic secretary — secretary (def 5).
  • diplomatic-secretary — secretary (def 5).
  • dirac delta function — delta function.
  • direct memory access — (architecture)   (DMA) A facility of some architectures which allows a peripheral to read and write memory without intervention by the CPU. DMA is a limited form of bus mastering.
  • directional drilling — a method of drilling for oil in which the well is not drilled vertically, as when a number of wells are to be drilled from a single platform to reach different areas of an oil field
  • directory assistance — a telephone company service that furnishes telephone directory information over the telephone.
  • directory user agent — (DUA) The software that accesses the X.500 Directory Service on behalf of the directory user. The directory user may be a person or another software element.
  • disability allowance — an amount of money paid by the government to people who are unable to work because of a disability. This is a general term or, in the UK, a shorter way of referring to what is officially called the Disability Living Allowance
  • discounted cash flow — a technique for appraising an investment that takes into account the different values of future returns according to when they will be received
  • discretionary income — money for luxuries
  • diskless workstation — (computer, networking)   A personal computer or workstation which has neither a hard disk nor floppy disk drive and which performs all file access via a local area network connection to a file server. The lowest level bootstrap code is stored in non-volatile storage. This uses a simple protocol such as BOOTP to request and download more sophisticated boot code and eventually, the operating system. The archtypal product was the 3Station developed by Bob Metcalfe at 3Com. Another example was the Sun 3/50. Diskless workstations are ideal when many users are running the same application. They are small, quiet, more reliable than products with disks, and help prevent both the theft of data and the introduction of viruses since the software and data available on them is controlled by the network administrator or system administrator. They do however rely on a server which becomes a disadvantage if it is heavily loaded or down. See also breath-of-life packet.
  • displacement tonnage — the number of long tons of water displaced by a vessel, light or load displacement being specified.
  • disproportionateness — The state or quality of being disproportionate or out of proportion.
  • distribution channel — trade: retailer
  • district of columbia — a federal area in the E United States, on the Potomac, coextensive with the federal capital, Washington. 69 sq. mi. (179 sq. km). Abbreviation: DC (for use with zip code), D.C.
  • documentary evidence — law: written
  • dolly varden pattern — a fabric print consisting of bouquets of flowers.
  • domestic heating oil — a liquid petroleum product used to fuel residential building furnaces or boilers
  • double fertilization — the fertilization process characteristic of flowering plants, in which one sperm cell of a pollen grain fertilizes an egg cell while a second fuses with two polar nuclei to produce a triploid body that gives rise to the endosperm.
  • double-aspect theory — a monistic theory that holds that mind and body are not distinct substances but merely different aspects of a single substance
  • double-trailer truck — tandem trailer (def 1).
  • draw the short straw — to be the person (as in drawing lots) to whom an unwelcome task or fate falls
  • eat out of sb's hand — If you have someone eating out of your hand, they are completely under your control.
  • education department — the department of a local authority that is concerned with education, or the government department concerned with education
  • educational quotient — a numerical measure of an educational system's effectiveness, based on standardized test scores, graduation rate, and other factors.
  • edward the confessor — Saint, 1002?–66, English king 1042–66: founder of Westminster Abbey.
  • electoral boundaries — the way that a country or area is divided for the purposes of voting in an election
  • electrocardiographic — Of or pertaining to an electrocardiogram (ECG) or electrocardiograph.
  • electrohydrodynamics — (physics) the study of the dynamics of electrically conducting fluid.
  • elementary education — the first six to eight years of a child's education
  • endorsement in blank — an endorsement on a bill of exchange, cheque, etc, naming no payee and thus making the endorsed sum payable to the bearer
  • essential amino acid — an amino acid that cannot be synthesized in the body and is thus an essential component of the diet
  • estrela mountain dog — a sturdy well-built dog of a Portuguese breed with a long thick coat and a thick tuft of hair round the neck, often used as a guard dog
  • every bit as good as — You say that one thing is every bit as good, interesting, or important as another to emphasize that the first thing is just as good, interesting, or important as the second.
  • explication de texte — a close textual analysis of a literary work
  • factor of production — any instrument, agent, etc., employed in the production of goods and services.
  • faculty of advocates — the college or society of advocates in Scotland
  • fast-breeder reactor — a breeder reactor in which there is no moderator and fission is caused by high-energy neutrons.
  • federal constitution — Constitution of the United States.
  • federal reserve note — a form of paper money issued by a Federal Reserve Bank.
  • federation of malaya — a federation of the nine Malay States of the Malay Peninsula and two of the Straits Settlements (Malacca and Penang): formed in 1948: became part of the British Commonwealth in 1957 and joined Malaysia in 1963
  • fight tooth and nail — fight fiercely
  • file descriptor leak — (programming)   (Or "fd leak" /F D leek/) A kind of programming bug analogous to a core leak, in which a program fails to close file descriptors ("fd"s) after file operations are completed, and thus eventually runs out of them. See leak.
  • fission-track dating — the dating of samples of minerals by comparing the tracks in them by fission fragments of the uranium nuclei they contain, before and after irradiation by neutrons
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